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Sweet Potatoes are also high in Vitamin B-6, High in Potassium and complex carbohydrates. 
Sam’s Yams Guaranteed Analysis
Crude Protein Not less than 5%
Crude Fat - minimum 0.5%
Crude Fiber Not more than 2 %
Moisture Not more than 35%

Sam’s Yams use no refined or highly processed food items. No animal by products, no animal digest, no rendered meat or fats. No corn or wheat gluten, two common allergens, no processed starches, polymers or plastic. 
Just a pure and simple food, Sweet Potato.

Vegetable
(1/2 cup cooked)
Score Vitamin A Vitamin C Folate Iron Copper Calcium Fiber
Sweetpotato
(no skin)
582 X X *   X   X
Carrots 408 X       *   *
Spinach 241 X X X X * X *
Collard Greens 181 X X X *   X  
Red Pepper 166 X X          
Kale 161 X X     * * *
Broccoli 145 X X X       *
White Potato 114   X * X X   X
Asparagus 75 X X X   *   *
Green Peas 64 X X X * *   X
Corn 39    *  X       X
Green Beans 37 * X *        
Tomatoes 37 * X          
Summer Squash 31 * * *   *    

Source: Nutrition Action Healthletter, Dec., 1991. CSPI, Washington, D.C.

X = contains at least 10% of the USRDA
* = contains between 5 and 9% of the USRDA
http://www.cayam.com/whatis_nutricomp.shtml